Not "technicaly necessary". If you have the funds, it would aid you in testicular recovery time. I t WILL keep your nut full! HCG is a slin needle, so pinning it is no big deal. With a 12 week cycle, probably not necessary. If you are going to use it, make sure you have an AI on hand, as your E2 will increase. For me, the E2 effect of HCG makes it not worth it.